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Promotion of bone formation using highly pure porous β-TCP combined with bone marrow-derived osteoprogenitor cells

Paper ID Volume ID Publish Year Pages File Format Full-Text
13082 829 2002 10 PDF Available
Title
Promotion of bone formation using highly pure porous β-TCP combined with bone marrow-derived osteoprogenitor cells
Abstract

β-tricalcium phosphate (TCP) exhibits rapid degradation and weak mechanical properties, which has limited its application as bone graft substitutes, though it has good biocompatibility and osteoconductivity. We hypothesized that a composite of highly pure porous β-TCP and bone marrow-derived osteoprogenitor cells (BMO) could improve bone formation, and slow down the degradation of β-TCP. A highly pure porous β-TCP with 75% porosity was fabricated. The pores averaged 200–400 μm in diameter, with interconnecting paths 100–200 μm. Blocks of β-TCP 5 mm3 were combined with BMO, and incubated 2 weeks with (+) or without (−) osteogenic medium. They were then implanted into subcutaneous sites of syngeneic rats for 24 weeks. These composites were harvested at different time points. The alkaline phosphatase activity and bone osteocalcin content of the composites (+) were much higher than corresponding values in the composites (−) of the control group (p<0.01). Light microscopy revealed mature bone and lots of blood vessels only in the TCP/BMO composite (+). The amount of newly formed bone increased until week 24. Slow resorptive activity could be found. The mechanical parameters of the composites were much improved over those of dry β-TCP blocks. These results showed that tissue engineering treatment on incubating the composites of β-TCP and BMO cells in osteogenic medium results in a good osteogenic activity.

Keywords
Tricalcium phosphate; Biodegradable; Osteoprogenitor cells; Bone formation; Tissue engineering
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Promotion of bone formation using highly pure porous β-TCP combined with bone marrow-derived osteoprogenitor cells
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Publisher
Database: Elsevier - ScienceDirect
Journal: Biomaterials - Volume 23, Issue 23, December 2002, Pages 4493–4502
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us